Voltage Regulators - Undercharging/Overcharging
Number 87-6 (Gasoline)-16A Date 4/87Subject: INOPERATIVE VOLTAGE REGULATORS
1986-87 BONNEVILLE, GRAND PRIX, AND FIREBIRD MODELS
CONDITION:
Under certain operating conditions, the voltage regulator may become inoperative causing either a no-charge or full-charge condition. A no-charge can lead to a no-start condition, while a full-charge can lead to excessive battery charging, which can damage the battery.
CORRECTION:
An improved voltage regulator, P/N 1116423, has been released. Replace the original regulator with the new regulator. The new regulator can be used for any 1986 Bonneville, Firebird or Grand Prix or 1987 Safari Wagon or Grand Prix models.
If the entire generator must be replaced, use the table on the following page for correct part numbers.
WARRANTY INFORMATION:
Use existing Labor operations.
Engine Usage Rating Series Original P/N Service P/N
LG4 86 B,G/ 56 12SI 1105676 1101307
87 G,F 78 12SI 1105652 1101307
66 12SI 1105675 1101307
94 12SI 1105654 1101308
LD5 86 B,G/ 56 12SI 1100239 1101307
87 G 78 12SI 1100200 1101307
70 15SI 1105197 1101322
85 15SI 1105548 1101323
LB4 86 B/ 56 12SI 1105673 1101307
87 G 66 12SI 1105674 1101307
78 12SI 1105650 1101307
94 12SI 1105651 1101308
LB8 86 F/ 66 12SI 1105600 1101307
87 F 78 12SI 1105588 1101307
97 17SI 1105587 1101306
LB9 86 F/ 108 17SI 1101224 1101306
87 F